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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 268 (Abs - Diagnostics) >> Diagnostic Tests >> DTC C1203/53: ECM Communication Circuit Malfunction >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Toyota Sequoia. However, it is still accessible from the selected car via links, so may be relevant.

This circuit is used to send TRAC & VSC control information from the skid control ECU to the ECM (TRC+, TRC-), and engine control information from the ECM to the skid control ECU (ENG+, ENG-).

For detected conditions & trouble areas in the ECM communication circuit, see Fig 1.

Fig 1: Identifying ECM Communication Circuit Malfunction Detected Conditions & Trouble Areas
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